[FIX] hr_timesheet: fix incorrect company on timesheet report

- Create 2 companies (i.e. Company A & Company B)
- Create user with access to both companies and default company set to Company B
- Log with created user
- Switch to Company A
- Go to Project and create a new Project (i.e. Project X)
- Go to Timesheets and add a line for Project X
- Display all timesheets in list view
- Select created timesheet and print "Timesheet Entries"
Logo and address printed on timesheet report are from Company B.

Company used for timesheet report is default company of current user.

This fix will use company linked to the project if it is unique.
Otherwise, it will use current company.

opw-2502182
opw-2509463

closes odoo/odoo#74281

X-original-commit: 0812641544d49746d111ca4bb88a2091bf0dd6c8
Signed-off-by: LTU-Odoo <IT-Ideas@users.noreply.github.com>

addons/hr_timesheet/report/report_timesheet_templates.xml

@@ -2,6 +2,7 @@
     <template id="report_timesheet">
         <t t-call="web.html_container">
             <t t-call="web.external_layout">
+                <t t-set="company" t-value="docs.mapped('project_id')[0].company_id if len(docs.mapped('project_id')) == 1 else docs.env.company"/>
                 <t t-set="show_task" t-value="bool(docs.mapped('task_id'))"/>
                 <t t-set="show_project" t-value="len(docs.mapped('project_id')) > 1"/>
                 <div class="page">